I had a long time and again problems with devices that were connected via USB to my PC. Especially printers. This was extremely annoying. Once again it was not, then, reinstall drivers. Then again device not recognized. Until a friend of mine the tip against, zuzulegen a USB hub with an active power supply. But not cheap. This it has become, and since then it's good! No more problems with non-recognition of printers (3 I). Windoze logs because although always with senseless pop-ups, but it sparks anything. Stable. Finally.